package com.itheima.controller;

import com.itheima.pojo.Result;
import com.itheima.pojo.User;
import com.itheima.service.UserService;
import com.itheima.utils.JwtUtil;
import com.itheima.utils.Md5Util;
import com.itheima.utils.ThreadLocalUtil;
import jakarta.validation.constraints.Pattern;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static javax.swing.text.html.HTML.Tag.U;

@Validated
@RestController
@RequestMapping("/user")
public class UserController {
        @Autowired
        private UserService userService;
        @Autowired
        private StringRedisTemplate redisTemplate;
    //注册
    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){
        //查询用户
        User u = userService.findByUserName(username);
        if(u == null){
            //注册
            userService.register(username,password);
            return Result.success();
        }else{
            //用户名存在
            return Result.error("用户名已存在");
        }
    }
    //登录
    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){
        //查询用户
        User loginUser = userService.findByUserName(username);
        //判断用户是否存在
        if(loginUser == null){
            return Result.error("用户名不存在");
        }
        //判断密码是否正确
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            //登录成功
            Map<String, Object> claims =new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            String token = JwtUtil.genToken(claims);
            //将token存储进Redis中
            ValueOperations<String,String> operations = redisTemplate.opsForValue();
            operations.set(token,token,1, TimeUnit.HOURS);
            return Result.success(token);
        }
        return Result.error("密码错误");
    }

    @GetMapping("/userInfo")
    //根据用户名查询用户
    public Result<User> userInfo(/*@RequestHeader(name="Authorization") String token*/){
//        Map<String, Object> map = JwtUtil.parseToken(token);
//        String username = (String) map.get("username");
       Map<String, Object> map =  ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User user = userService.findByUserName(username);
        return Result.success(user);

    }
    //修改
   @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){
        userService.update(user);
        return Result.success();
    }

    //更新头像
    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl){
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    //修改密码
    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){
        //1、校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String  rePwd = params.get("re_pwd");
        if(!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd) || !newPwd.equals(rePwd)){
            return Result.error("缺少必要参数");
        }
        //原密码是否正确
        Map<String, Object> map =  ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if(!loginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("原密码错误");
        }
        //新密码对比
        if (!rePwd.equals(newPwd)){
            return Result.error("两次密码不一致");
        }
        //更新密码
        userService.updatePwd(newPwd);

        //删除Redis中token
        ValueOperations<String, String> operations = redisTemplate.opsForValue();
        operations.getOperations().delete(token);
        return Result.success();
    }

}
